Atec Agilent-8703A - Manual (Page 7)

External lightwave sources 22
Option 100 allows external lightwave sources to be used
with the Agilent 8703A lightwave component analyzer. The
external sources must conform to the following characteristics.
Wavelengths 17 :
1530 to 1570 nm Option 210
1290 to 1330 nm Option 220
Reflection sensitivity: external laser input port typical
optical return loss >15 dBo
Average output power range
18 : 100 µW to 5 mW
(–10 dBm to +7 dBm)
Compatible fiber: 9/125 um
Degree of signal polarization: >20:1
Polarization controller: two quarter-wavelength
elements required
Lightwave receiver characteristics 19
Input wavelength 20 : 1298 to 1560 nm
Input modulation bandwidth: 130 MHz to 20 GHz
Maximum average input power operating level:
5 mW (+7 dBm)
Average input power damage level: 10 mW
(+10 dBm)
System sensitivity (using 10 Hz IF bandwidth, 16
averages, p-p): 20 nW (–47 dBm) (typical)
Polarization sensitivity: ±0.05 dB (typical)
Input port return loss: >20 dBo (typical)
Lightwave directional
coupler characteristics
Wavelength: 1298 to 1560 nm
Coupling factor (“test port” to “coupled” port): 3 dB
(typical)
Main arm loss (“input” port to “test port”): 3 dB (typical)
Directivity
21 : 37 dB (typical)
Isolation (“input” port to “coupled” port): 40 dB (typical)
Return loss, all ports: 37 dBo (typical with HMS-10
connector types)
17 Caution! Do not input wavelengths below 1200 nm. Damage to the
8703A optical modulator will result.
18 9 dB optical loss is typical for the external lightwave source path
through the optical modulator shown in Figure 1. This will affect
system dynamic range. Compare cases to 83424A and 83425A
configurations (Table 3 and 4) to calculate dynamic range for systems
using different external sources.
19 Lightwave receiver characteristics are tested in an environment of
>15 dBo optical source match return loss.
20 Lightwave receiver will operate beyond the system’s specified 1308
or 1550 ±10 nm and a normalized calibration can be done. However,
complete 8703A performance cannot be warranted outside of
1308 or 1550 ±10 nm.
21 Directivity (dB) = Isolation (dB) - Coupling Factor (dB). Specification
assumes a 37 dB return loss connector match at the coupler’s “test
port”. Coupler’s isolation will be degraded reducing directivity when
a connector of less than 37 dB return loss is connected to the “test
port”.
22
7
INVISIBLE LASER RADIATION-AVOID
DIRECT EXPOSURE TO BEAM
FDA LASER CLASS I PRODUCT
IEC LASER CLASS 1 PRODUCT